1845.] across the Peninsula of Southern India. 517 



At its contact with the chloritic schist the granite loses its mica, 

 becomes a pegmatite, and is. seamed with vertical lines of cleavage. 

 The felspar of the granite becomes more compact, and is of a pale 

 pink colour. Its quartz often acquires a greenish blue tinge, probably 

 from the contiguity of the chlorite, and its structure becomes pris- 

 matic. Dark dendritic markings occur on the superficies of the 

 prism. 



A few feet from the line of contact the mica reappears in the granite. 

 Thin flakes of chlorite, however, are visible in its structure, which 

 impart to it a somewhat laminar character. Actynolite also occurs 

 in the veins of eurite, quartz, and felspar, with which these mountain 

 masses of granite are intersected. 



The chloritic schist has been hardened and often converted into jaspi- 

 deous rock at the contact. The smooth surfaces and the prismatic frag- 

 ments into which it splits, on being struck by the hammer, exhibit dark 

 arborescent delineations on a pale greenish yellow ground curiously con- 

 trasted with the dull, greenish blue colour of the schist. Short veins 

 from the granite are seen penetrating the chlorite schist; and it is 

 evident that, at this point at least, as at the celebrated locality of Glen 

 Tilt, the granite must have penetrated this hypogene rock in a liquid or 

 semi-liquid state. Some of the seams in both rocks are lined or filled 

 with calcareous incrustations. 



Bijanugger. From Daroji to the celebrated ruins of Bijanugger 

 (about fifteen miles) the route lies through low clusters of hills princi- 

 pally of granite and gneiss. The felspar of the granite is usually red- 

 dish, and it is often coloured by actynolite of lively shades of green. 



From the low grounds between these hills, hornblende and chloritic 

 schists are frequently seen out- cropping, and are the outgoing of numer- 

 ous basaltic dykes, the general direction of which is Westerly and North- 

 westerly. 



Angular and slightly worn fragments of a coarse variegated jasper, 

 a ferruginous quartz and indurated clay, occur scattered on the surface 

 of the valley along which the road lies, mingled with fragments of the 

 other rocks in sitti. It is probable these fragments of jasper have been 

 derived from the Sondur ranges on the left or W. The range on the 

 right, as Bijanugger is neared, assumes the more rugged and indented 

 aspect peculiar to granite. 



